**TI83F* AppVariable file 04/03/07, 10:26 ïGLM304ïínav CBD1EB6C7C194582A7A527AA737FADAEGLM304.GLM3041   congruent#congruent:ÖHaving the same measure. corresponding partsFcorresponding parts:ÖParts of congruent or similar figures that match. cross products¦cross products:ÖThe product of the terms on the diagonals when two ratios are compared.ÖExample:ÖIn the proportionÖ2/3 = 8/12 the cross products are 2 12 andÖ3 8. dilationDdilation:ÖA transformation in which a figure is enlarged or reduced. equivalent ratiosLequivalent ratios:ÖTwo ratios that have the same value.ÖExample: 5:4 = 10:8Ö indirect measurementJindirect measurement:ÖA technique using proportions to find a measurement. polygonQpolygon:ÖA simple closed figure in a plane formed by three or more line segments.  proportionVproportion:ÖAn equation of the form Öa/b = c/d stating that two ratios are equivalent.  ratebrate:ÖThe ratio of two measurements having different units of measure.ÖExample: Ö60 miles per hour  rate of change3rate of change:ÖThe change in a quantity over time.  ratio/ratio:ÖA comparison of two numbers by division.  scaleVscale:ÖA ratio or rate between the actual size of an object and the size of its model.   scale drawing`scale drawing:ÖA drawing that is similar to an actual object, but is either enlarged or reduced.  scale factor:scale factor:ÖA scale written as a ratio in simplest form.  scale modelgscale model:ÖA replica of an original object that is too large or too small to be built at actual size. similar figuresTsimilar figures:ÖFigures that have the same shape but not necessarily the same size.  unit rate*unit rate:ÖA rate with a denominator of 1.äV